<?php
class Cart {
  private $data = array();

  public function __construct($registry) {
    $this->config = $registry->get('config');
    $this->customer = $registry->get('customer');
    $this->session = $registry->get('session');
    $this->db = $registry->get('db');
    $this->tax = $registry->get('tax');
    $this->weight = $registry->get('weight');

    $this->registry = $registry;
    
    if (!isset($this->session->data['cart']) || !is_array($this->session->data['cart'])) {
      $this->session->data['cart'] = array();
    }
  }
   
  /**
   *
   * Ritorna la vista su cui andare a recuperare i dati dei prodotti
   */
  public function getViewProduct() {

    return ($this->registry->get('test')) ? 'v_product_test' : 'v_product';
  }

  public function getProducts() {
    if (!$this->data) {
      foreach ($this->session->data['cart'] as $key => $quantity) {
        $product = explode(':', $key);
        $product_id = $product[0];
        $stock = true;

        // Options
        if (isset($product[1])) {
          $options = unserialize(base64_decode($product[1]));
        } else {
          $options = array();
        }

        //MyOC: $product_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "product p LEFT JOIN " . DB_PREFIX . "product_description pd ON (p.product_id = pd.product_id) WHERE p.product_id = '" . (int)$product_id . "' AND pd.language_id = '" . (int)$this->config->get('config_language_id') . "' AND p.date_available <= NOW() AND p.status = '1'");
        $view_products = $this->getViewProduct();
        $product_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "$view_products p LEFT JOIN " . DB_PREFIX . "product_description pd ON (p.product_id = pd.product_id) WHERE p.product_id = '" . (int)$product_id . "' AND pd.language_id = '" . (int)$this->config->get('config_language_id') . "'  AND p.status = '1'");
 
        if ($product_query->num_rows) {
          $option_price = 0;
          $option_points = 0;
          $option_weight = 0;

          $option_data = array();

          foreach ($options as $product_option_id => $option_value) {
            $option_query = $this->db->query("SELECT po.product_option_id, po.option_id, od.name, o.type FROM " . DB_PREFIX . "product_option po LEFT JOIN `" . DB_PREFIX . "option` o ON (po.option_id = o.option_id) LEFT JOIN " . DB_PREFIX . "option_description od ON (o.option_id = od.option_id) WHERE po.product_option_id = '" . (int)$product_option_id . "' AND po.product_id = '" . (int)$product_id . "' AND od.language_id = '" . (int)$this->config->get('config_language_id') . "'");

            if ($option_query->num_rows) {
              if ($option_query->row['type'] == 'select' || $option_query->row['type'] == 'radio' || $option_query->row['type'] == 'image') {
                $option_value_query = $this->db->query("SELECT pov.option_value_id, ovd.name, pov.quantity, pov.subtract, pov.price, pov.price_prefix, pov.points, pov.points_prefix, pov.weight, pov.weight_prefix FROM " . DB_PREFIX . "product_option_value pov LEFT JOIN " . DB_PREFIX . "option_value ov ON (pov.option_value_id = ov.option_value_id) LEFT JOIN " . DB_PREFIX . "option_value_description ovd ON (ov.option_value_id = ovd.option_value_id) WHERE pov.product_option_value_id = '" . (int)$option_value . "' AND pov.product_option_id = '" . (int)$product_option_id . "' AND ovd.language_id = '" . (int)$this->config->get('config_language_id') . "'");

                if ($option_value_query->num_rows) {
                  if ($option_value_query->row['price_prefix'] == '+') {
                    $option_price += $option_value_query->row['price'];
                  } elseif ($option_value_query->row['price_prefix'] == '-') {
                    $option_price -= $option_value_query->row['price'];
                  }

                  if ($option_value_query->row['points_prefix'] == '+') {
                    $option_points += $option_value_query->row['points'];
                  } elseif ($option_value_query->row['points_prefix'] == '-') {
                    $option_points -= $option_value_query->row['points'];
                  }

                  if ($option_value_query->row['weight_prefix'] == '+') {
                    $option_weight += $option_value_query->row['weight'];
                  } elseif ($option_value_query->row['weight_prefix'] == '-') {
                    $option_weight -= $option_value_query->row['weight'];
                  }
                  	
                  if ($option_value_query->row['subtract'] && (!$option_value_query->row['quantity'] || ($option_value_query->row['quantity'] < $quantity))) {
                    $stock = false;
                  }
                  	
                  $option_data[] = array(
										'product_option_id'       => $product_option_id,
										'product_option_value_id' => $option_value,
										'option_id'               => $option_query->row['option_id'],
										'option_value_id'         => $option_value_query->row['option_value_id'],
										'name'                    => $option_query->row['name'],
										'option_value'            => $option_value_query->row['name'],
										'type'                    => $option_query->row['type'],
										'quantity'                => $option_value_query->row['quantity'],
										'subtract'                => $option_value_query->row['subtract'],
										'price'                   => $option_value_query->row['price'],
										'price_prefix'            => $option_value_query->row['price_prefix'],
										'points'                  => $option_value_query->row['points'],
										'points_prefix'           => $option_value_query->row['points_prefix'],									
										'weight'                  => $option_value_query->row['weight'],
										'weight_prefix'           => $option_value_query->row['weight_prefix']
                  );
                }
              } elseif ($option_query->row['type'] == 'checkbox' && is_array($option_value)) {
                foreach ($option_value as $product_option_value_id) {
                  $option_value_query = $this->db->query("SELECT pov.option_value_id, ovd.name, pov.quantity, pov.subtract, pov.price, pov.price_prefix, pov.points, pov.points_prefix, pov.weight, pov.weight_prefix FROM " . DB_PREFIX . "product_option_value pov LEFT JOIN " . DB_PREFIX . "option_value ov ON (pov.option_value_id = ov.option_value_id) LEFT JOIN " . DB_PREFIX . "option_value_description ovd ON (ov.option_value_id = ovd.option_value_id) WHERE pov.product_option_value_id = '" . (int)$product_option_value_id . "' AND pov.product_option_id = '" . (int)$product_option_id . "' AND ovd.language_id = '" . (int)$this->config->get('config_language_id') . "'");
                  	
                  if ($option_value_query->num_rows) {
                    if ($option_value_query->row['price_prefix'] == '+') {
                      $option_price += $option_value_query->row['price'];
                    } elseif ($option_value_query->row['price_prefix'] == '-') {
                      $option_price -= $option_value_query->row['price'];
                    }

                    if ($option_value_query->row['points_prefix'] == '+') {
                      $option_points += $option_value_query->row['points'];
                    } elseif ($option_value_query->row['points_prefix'] == '-') {
                      $option_points -= $option_value_query->row['points'];
                    }
                    	
                    if ($option_value_query->row['weight_prefix'] == '+') {
                      $option_weight += $option_value_query->row['weight'];
                    } elseif ($option_value_query->row['weight_prefix'] == '-') {
                      $option_weight -= $option_value_query->row['weight'];
                    }

                    if ($option_value_query->row['subtract'] && (!$option_value_query->row['quantity'] || ($option_value_query->row['quantity'] < $quantity))) {
                      $stock = false;
                    }

                    $option_data[] = array(
											'product_option_id'       => $product_option_id,
											'product_option_value_id' => $product_option_value_id,
											'option_id'               => $option_query->row['option_id'],
											'option_value_id'         => $option_value_query->row['option_value_id'],
											'name'                    => $option_query->row['name'],
											'option_value'            => $option_value_query->row['name'],
											'type'                    => $option_query->row['type'],
											'quantity'                => $option_value_query->row['quantity'],
											'subtract'                => $option_value_query->row['subtract'],
											'price'                   => $option_value_query->row['price'],
											'price_prefix'            => $option_value_query->row['price_prefix'],
											'points'                  => $option_value_query->row['points'],
											'points_prefix'           => $option_value_query->row['points_prefix'],
											'weight'                  => $option_value_query->row['weight'],
											'weight_prefix'           => $option_value_query->row['weight_prefix']
                    );
                  }
                }
              } elseif ($option_query->row['type'] == 'text' || $option_query->row['type'] == 'textarea' || $option_query->row['type'] == 'file' || $option_query->row['type'] == 'date' || $option_query->row['type'] == 'datetime' || $option_query->row['type'] == 'time') {
                $option_data[] = array(
									'product_option_id'       => $product_option_id,
									'product_option_value_id' => '',
									'option_id'               => $option_query->row['option_id'],
									'option_value_id'         => '',
									'name'                    => $option_query->row['name'],
									'option_value'            => $option_value,
									'type'                    => $option_query->row['type'],
									'quantity'                => '',
									'subtract'                => '',
									'price'                   => '',
									'price_prefix'            => '',
									'points'                  => '',
									'points_prefix'           => '',								
									'weight'                  => '',
									'weight_prefix'           => ''
									);
              }
            }
          }

          if ($this->customer->isLogged()) {
            $customer_group_id = $this->customer->getCustomerGroupId();
          } else {
            $customer_group_id = $this->config->get('config_customer_group_id');
          }
          	
          $price = $product_query->row['price'];
          	
          // Product Discounts
          $discount_quantity = 0;
          	
          foreach ($this->session->data['cart'] as $key_2 => $quantity_2) {
            $product_2 = explode(':', $key_2);

            if ($product_2[0] == $product_id) {
              $discount_quantity += $quantity_2;
            }
          }
          	
          $product_discount_query = $this->db->query("SELECT price FROM " . DB_PREFIX . "product_discount WHERE product_id = '" . (int)$product_id . "' AND customer_group_id = '" . (int)$customer_group_id . "' AND quantity <= '" . (int)$discount_quantity . "' AND ((date_start = '0000-00-00' OR date_start < NOW()) AND (date_end = '0000-00-00' OR date_end > NOW())) ORDER BY quantity DESC, priority ASC, price ASC LIMIT 1");
          	
          if ($product_discount_query->num_rows) {
            $price = $product_discount_query->row['price'];
          }
          	
          // Product Specials
          $product_special_query = $this->db->query("SELECT price FROM " . DB_PREFIX . "product_special WHERE product_id = '" . (int)$product_id . "' AND customer_group_id = '" . (int)$customer_group_id . "' AND ((date_start = '0000-00-00' OR date_start < NOW()) AND (date_end = '0000-00-00' OR date_end > NOW())) ORDER BY priority ASC, price ASC LIMIT 1");

          if ($product_special_query->num_rows) {
            $price = $product_special_query->row['price'];
          }
          	
          // Reward Points
          $product_reward_query = $this->db->query("SELECT points FROM " . DB_PREFIX . "product_reward WHERE product_id = '" . (int)$product_id . "' AND customer_group_id = '" . (int)$customer_group_id . "'");
          	
          if ($product_reward_query->num_rows) {
            $reward = $product_reward_query->row['points'];
          } else {
            $reward = 0;
          }
          	
          // Downloads
          $download_data = array();
          	
          $download_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "product_to_download p2d LEFT JOIN " . DB_PREFIX . "download d ON (p2d.download_id = d.download_id) LEFT JOIN " . DB_PREFIX . "download_description dd ON (d.download_id = dd.download_id) WHERE p2d.product_id = '" . (int)$product_id . "' AND dd.language_id = '" . (int)$this->config->get('config_language_id') . "'");

          foreach ($download_query->rows as $download) {
            $download_data[] = array(
							'download_id' => $download['download_id'],
							'name'        => $download['name'],
							'filename'    => $download['filename'],
							'mask'        => $download['mask'],
							'remaining'   => $download['remaining']
            );
          }
          	
          // Stock
          if (!$product_query->row['quantity'] || ($product_query->row['quantity'] < $quantity)) {
            $stock = false;
          }
          	
          $this->data[$key] = array(
						'key'             => $key,
						'product_id'      => $product_query->row['product_id'],
						'name'            => $product_query->row['name'],
						'model'           => $product_query->row['model'],
						'shipping'        => $product_query->row['shipping'],
						'image'           => $product_query->row['image'],
						'option'          => $option_data,
						'download'        => $download_data,
						'quantity'        => $quantity,
						'minimum'         => $product_query->row['minimum'],
						'subtract'        => $product_query->row['subtract'],
						'stock'           => $stock,
						'price'           => ($price + $option_price),
						'total'           => ($price + $option_price) * $quantity,
						'reward'          => $reward * $quantity,
						'points'          => ($product_query->row['points'] ? ($product_query->row['points'] + $option_points) * $quantity : 0),
						'tax_class_id'    => $product_query->row['tax_class_id'],
						'weight'          => ($product_query->row['weight'] + $option_weight) * $quantity,
						'weight_class_id' => $product_query->row['weight_class_id'],
						'length'          => $product_query->row['length'],
						'width'           => $product_query->row['width'],
						'height'          => $product_query->row['height'],
						'length_class_id' => $product_query->row['length_class_id']					
          );
        } else {
          $this->remove($key);
        }
      }
    }

    return $this->data;
  }

  public function add($product_id, $qty = 1, $option = array()) {
    if (!$option) {
      $key = (int)$product_id;
    } else {
      $key = (int)$product_id . ':' . base64_encode(serialize($option));
    }
     
    if ((int)$qty && ((int)$qty > 0)) {
    		if (!isset($this->session->data['cart'][$key])) {
    		  $this->session->data['cart'][$key] = (int)$qty;
    		} else {
    		  $this->session->data['cart'][$key] += (int)$qty;
    		}
    }

    $this->data = array();
  }

  public function update($key, $qty) {
    if ((int)$qty && ((int)$qty > 0)) {
      $this->session->data['cart'][$key] = (int)$qty;
    } else {
      $this->remove($key);
    }

    $this->data = array();
  }

  public function remove($key) {
    if (isset($this->session->data['cart'][$key])) {
      unset($this->session->data['cart'][$key]);
  		}

  		$this->data = array();
  }

  public function clear() {
    $this->session->data['cart'] = array();
    $this->data = array();
  }

  public function getWeight() {
    $weight = 0;

    foreach ($this->getProducts() as $product) {
      if ($product['shipping']) {
        $weight += $this->weight->convert($product['weight'], $product['weight_class_id'], $this->config->get('config_weight_class_id'));
      }
    }

    return $weight;
  }

  public function getSubTotal() {
    $total = 0;

    foreach ($this->getProducts() as $product) {
      $total += $product['total'];
    }

    return $total;
  }

  public function getTaxes() {
    $tax_data = array();

    foreach ($this->getProducts() as $product) {
      if ($product['tax_class_id']) {
        $tax_rates = $this->tax->getRates($product['total'], $product['tax_class_id']);

        foreach ($tax_rates as $tax_rate) {
          $amount = 0;
          	
          if ($tax_rate['type'] == 'F') {
            $amount = ($tax_rate['amount'] * $product['quantity']);
          } elseif ($tax_rate['type'] == 'P') {
            $amount = $tax_rate['amount'];
          }
          	
          if (!isset($tax_data[$tax_rate['tax_rate_id']])) {
            $tax_data[$tax_rate['tax_rate_id']] = $amount;
          } else {
            $tax_data[$tax_rate['tax_rate_id']] += $amount;
          }
        }
      }
    }

    return $tax_data;
  }

  public function getTotal() {
    $total = 0;

    foreach ($this->getProducts() as $product) {
      $total += $this->tax->calculate($product['total'], $product['tax_class_id'], $this->config->get('config_tax'));
    }

    return $total;
  }

  public function countProducts() {
    $product_total = 0;
    	
    $products = $this->getProducts();
    	
    foreach ($products as $product) {
      $product_total += $product['quantity'];
    }
    	
    return $product_total;
  }
   
  public function hasProducts() {
    return count($this->session->data['cart']);
  }

  public function hasStock() {
    $stock = true;

    foreach ($this->getProducts() as $product) {
      if (!$product['stock']) {
        $stock = false;
      }
    }

    return $stock;
  }

  public function hasShipping() {
    $shipping = false;

    foreach ($this->getProducts() as $product) {
      if ($product['shipping']) {
        $shipping = true;

        break;
      }
    }

    return $shipping;
  }

  public function hasDownload() {
    $download = false;

    foreach ($this->getProducts() as $product) {
      if ($product['download']) {
        $download = true;

        break;
      }
    }

    return $download;
  }
}
?>